Trunk comparison: Audi Q3 vs VW Tiguan Allspace

Key Differences
The VW Tiguan Allspace offers significantly more cargo space with the seats folded down than the Audi Q3: +9.4 in (14%) cargo length with seats folded. Even with the first row of seats upright, the Tiguan is longer: +8.7 in (24%).
In the opposite case — when all seats are upright — the Audi Q3 has a significantly longer trunk: +16.9 in (91%) in favor of the Q3. Also notable is the greater depth of the Audi trunk (distance from loading edge → trunk floor): +3.5 in (800%) compared to the Tiguan Allspace.
Impact on Usability
For transport tasks with the rear seats folded down or for very long cargo, the VW Tiguan Allspace is the more practical choice: the longer cargo space with folded seats makes it easier to store long items (e.g., slats, furniture parts, sports equipment).
You also benefit in everyday use if you often keep the first row upright and use the rest flexibly — here the Tiguan offers more usable length.
The Audi Q3 scores when all seats are regularly used: with significantly more trunk space with all seats upright, it offers more room for luggage or shopping when passengers remain in the rear seats.
The greater depth in the Q3 also means a deeper loading floor — this makes stacking and stabilizing taller or bulkier items in the cargo area easier and reduces the risk of cargo sliding over the loading edge.
At the same time, the deeper recess can make lifting very heavy items over the loading edge somewhat more challenging.
Other measured differences (e.g., opening height, loading edge height, trunk opening width) are below 10% and have only minor practical effects in most everyday scenarios; the narrowest interior width is the same in both models.